Pen



FIG. 1 is a top, front right side perspective view of a first embodiment of a pen showing my new design;

FIG. 2 is a top plan view thereof at an enlarged scale;

FIG. 3 is a bottom plan view thereof at an enlarged scale;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a left side elevation view thereof, the right side elevation view being a mirror image;

FIG. 7 is a top, front right side perspective view of a second embodiment of a pen showing my new design;

FIG. 8 is a top plan view thereof at an enlarged scale;

FIG. 9 is a bottom plan view thereof at an enlarged scale;

FIG. 10 is a front elevation view thereof;

FIG. 11 is a rear elevation view thereof; and,

FIG. 12 is a left side elevation view thereof, the right side elevation view being a mirror image.

The broken lines showing the grip and writing tip in FIGS. 1-12 of the drawings are included to show features that form no part of the claimed design. 

CLAIM The ornamental design for a pen, as shown and described. 